Fluid rotor



Jan. 23, 1940. M. P. CARPENTER 2,187,875

FLUID neuron Filed April 29,y 1937 5-Sheets-Sheet 1 ATTORNEY JUL 23, 1940. M, p, CARPENTER 2,187,875

FLUIDIROTOR Filed April 29, 1937 5 Sheets-Sheet 2 /N VEN TOR Mason PCar/venicn BY ATTORNEY Jan. 23, 1940. M. P. CARPENTER n 2,137,875

FLUID KOTOR Filed April 29, 1957 5 Sheets-Sheet 3 l /N VEA/TOR Mason R Ca @oen fer:

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A TTORNEY Jan. 23, 1940. M. P. CARPENTER FLUID RQTOR Filed April` 29. l937 5 Sheets-Sheet 4 /Nz/ENTO Mason i? Carpe?? ATTORNEY Jan. 23, 1940. M. P. CARPENTER 2,187,875

FLUID KOTOR Filed April 29, 1937 5 Sheets-Sheet 5 LE' /NVENTo/e Nason P Car/0972er:

@Wa/e 2M@ A TTORNEY Puentes 'Jut 23. 1940 2,187,87 5

FLUID BOTO! Mason l'. Carpenter, Panta Gorda, lla.. assigner to International Frictionless Brake Corporation,

Lansing, Mich., a corporation oi Michigan Application April 29, 1987, Seri No. 130.303

2. Claims. (Cl. 18H.)

This invention relates to duid rotors of `a Other objects have to do with the provision o( character wherein power is transmitted through Valve ectiltin Der f Devel construction and or dissipated by the compression of a iiuid conrrana'ement. md 0f Bell means for Preventing tained within the device. The invention is espethe escape of the fluid contained within the cially applicable to motor vehicle brakes. transfluid channel.

missions, clutches, and the like. For the purpose A preferred embodiment of the invention in a of illustration it is herein shown as embodied in brake for motor vehicles is shown in the accoma brake. panyins drawinss. wherein- The present invention is disclosed in part in Figure 1 is a diagrammatic illustration of a my copending applieationserlal No. 752,574,1lled motor vehicle chassis having associated with each 10 November l2, 1934, and this application is an of the wheels thereof abrake embodying the preeimprovement on said `prior cependins lDDllccD cnt Inventum' and lllllltletin! the mechanism for Briefly, the invention consists in providing a operati!!! ell 0f leid brakes; simultaneously; casing, arotor mounted within the casing toform Figure 2 is a cross-sectional view taken on a pair of fluid channels with the casing, a pair of substantially the line I-i of Figure i, showing l5 auxiliary rotors having their peripherie.; disposed the details of a brake embodying lthe present within the fluid channel in contact with the main invention as applied to the rear axle of a motor rotor, impeller valves carried by the main rotor vehicle; which are adapted to be moved into and out of Figure 3 is a sectional view taken on subeach'of the iluid channels, and means for actustantially the line 3 3 oi Figure 2;

ating the impeller valves. The main rotor is Figure 4 isa fragmentary sectional view taken adapted to be secured to a rotatable shaft, and on substantially the line l-I of Figure 3; the casing is adapted to-be secured to a sta- Figure 5 is a view similar to Figure 3, but tionary element. During operation, when the showing the mechanism in the braking position 2li impeller valves are in their inoperative position, as distinguished from the non-braking position 95 the casing and main rotor are freely rotatable shown in Figure 3; relative to each other. When the impeller valves Figure 6 is an enlarged fragmentary sectional are in their operative position, completely or view showing the relation of the main and an partially closing oi! the fluid channels, the uid is auxiliary rotor at one stage of operation;

trapped in the fluid channels between the impeller Figure 7 is a sectional view taken on substan.- 30

valves and the peripheries of the associated auxtially the line I-l of Figure 2; iliary rotors whereby the rotary movement of one Figure 8 is a view showing the relation of the of these partswith respect to the other may be main rotor to the spacer N taken on the line prevented. l-O of Figure 2;

When the present invention is embodied in a Figure 9 is an enlarged fragmentary sectional 35 brake for a motor vehicle, the main rotor is seview similar to Figure 7 showing the impeller cured to rotate with the wheel and the ccin iS valve in its operative position as distinguished Iiidly attched t0 e Stationary Dart 0f the li'rom the inoperative position shown in Figure 7; vehicle. Such as the rear axle housing, fOr eX- Figure 10 is a side view of the complete brake 40 emple- With this rangement 0f Puf-5 the mam' structure with the casing broken away to show 0 rotor rotates with the wheel axle until the imcertain of the internal parts thereof; peller valves have been moved into their opera- Figure u is an enlarged View partly in section tive position, whereupon the resistance of the and partly m elevation of he mechanism for fluid trapped in the iluici channels between the a ctuating the impeller valves, y impeller valves and the associated auxiliary Figure 12 is an enlarged sectional view of one rotors prevents or slows up, depending upon the position of 'the impeller valves, the rotation of of the impeller valves taken on the line I2i2 me main 'rotor and the me to which it is 0f me 2i and keyed with respect to the stationary casing and Figure 13 is a view taken on substantially the the housing to which 1t is seemed. line 0f F1811 12. `im

The principal object of the invention is the While, as stated above, the present invention provision of a novel construction and arrangehas application in devices Other than brakes. ment of the rotor and associated impeller valves andywhen applied to brakes isy not limited to mowhereby the possibility of inadvertently locking tor vehicle brakes, it is nevertheless for the purthe rotor with respect to the casing is avoided. pose of exemplincation here shown as embodied u UNITED STATES PATENT. OFFICE and rear wheels.

in a, brake associated with the wheel of a motor v vehicle.

In Figure 1 there is shown a motor vehicle chassis including the frame I 8, the front axle II, the front wheels I2,`the rear axle housing I3, the rear Wheels I4, and the drive shaft I5. A brake I6 is associated with each of the front The brakes are operated through an operating mechanism including the conventional brake pedal I1 and the mechanical linkages I8.

As best shown in Figures 2 and '7, the rear wheel hub I9 is keyed upon the rear axle 28 by a key 2|. The rotor portion of the brake I8 is keyed upon the hub I9 by key 22. 'I'he casing forming a part of the brake I6 is bolted to the rear axle housing I3. The wheel hub I9 includes a radial flange 24 to which the wheel I4 is se,l

cured by means of conventional securing bolts ly; a pair of valves 54 and 56 mounted in the main rotor 48 adapted to be moved into and out of theuid channels 49 and 58; a valve actuating" assembly including the valve shafts 1I and 19, the valve actuating ring 8|, the shift ring 84, the operatingring 85, the gearsegment 89,

and the crank arm 93 for the gear segment; and the auxiliary rotor driving means including gears 94 and 95 through which the shaft 39 for auxiliary'rotors 48 and 4I is driven from.the,main rotor 48.` d

The casing n The casing, as previously stated, includes the cylindrical shell 26 and the end members 21 vand 28. The cylindrical shell 28-is provided with AThe end members 21l and 28 are formed with aligned openings 33 -and 34fatthesides thereof for the reception of the wheel hub I9. The openings 33 and 34 are somewhat larger than the hub I9 to provide'room for the conventional bearings 35 and 36.

The end members 21 and 28' are provided with a pair of additional aligned openings 81 and 38 in the lower portion thereof to receive the shaft 39 upon which auxiliary rotors 48 and 4I are mounted. These openings are also formed larger than the shaft 39 to accommodate the conventional bearings 42 and 43.` All of the openings 33, 34, 31 and 38 are threaded to receive the closure caps 44, 45, 46 and 41.

The main rotor yThe main rotor 48 is provided at its periphery with a pair of axially spaced grooves which form with the cylindrical shell 26 of the kouter casing a pair of fluid channels 49 and 58. As clearly shown in Figure 2, the casing is provided with openings leading to these iiuid channels which are closed by the caps 5I and 52. These -viously'A stated, mounted upon shaft 39.

openings are to permit the introduction of fluid into the fluid channels 49 and 58.

A recess 53 is provided in rotor 48 at the bottom of the groove forming fluid channel 49 to receive an impeller valve 54, to be described presently. A similar recess 55 is provided in the rotor 48 at the bottom of the groove forming fluid channel 58 also to receive an impeller valve 56. The two recesses 53 and 55 are circumferentially spaced apart a distance equal to one-fourth of the circumference of the rotor 48, for a purpose which will appear presently.

Main rotor 48 is formed with a central opening through which the wheel hub I9 extends. As previously stated, the rotor is secured to the wheel hub by key 22 shown in Figures 5-and 7.

As clearly shown in Figure 2, rotor 48 does not completely occupy the axial space within the casing. As best shown in Figures 7 and 8, rotor 48 is formed with axially extending openings 48a which communicate with. the interior of the casing at the sides of the rotor. The openings 48a `and the space within the casing, not occupied by the rotors, is partially filled with the same fluid as used in fluid channels 49 and 58. Thisfor the iluid channels 49 and 58. Adjacentthe opposite sidesof the rotor, and adjacent the op-V posite-sides of the fluid channels 49 and 58, the

'rotor is provided with seal rings 51 which. are

mounted in annular recesses formed in the periphery ofthe rotor. These sealing elements prevent the escape of the fluid contained in the fluid channels 49 and 58. The rotor is providedabout the central opening therein, through which the wheel hub I9 extends, with a hub-like extension 58 at one side thereof which engages a portion of the bearing 35, and with a flat annular surface 59 at the other side thereof which engages a portion of the bearing 36.

- The auxiliary rotors The auxiliary rotors 48 and 4I are, as pre- They are each secured to the shaft by keys 63. As clearly shown in Figure `2, these auxiliary rotors are keyed upon the shaft in spaced relation to each other and arranged so that the periphery of auxiliary rotor 48 engages the main rotor 48 at the bottom ofthe peripheral groove `therein forming the fluid channel 49, and so that the periphery of auxiliary rotor 4I engages the main rotor 48 at the bottom of the peripheral groove forming the fluid channel 58.`

Of course, auxiliary rrotors 48 and'4I rotate with shaft 39.V Between the rotors `there is provided a stationary spacer 64. At the opposite Sides of the rotors there are also provided stationaryspacers 65 and 66.. Thus, auxiliary rotors 48 and 4I are arranged within recesses which they completely fill, except that there is no frictional engagement between the auxiliary rotors and the `walls of the recesses which they occupy.

The auxiliary Vrotors 48 and 4I are provided with seal rings 61 in the sides thereof adjacent their peripheries, of somewhat similar character to the seal rings 51 mounted upon the periphery ais'asvs of the main rotor 48. From an examination of Figure 2, it will be apparent that the seal rings 61 carried by the auxiliary rotors 40 and 4|, and the seal ring 51 carried by the main rotor 48 serve to effectively Prevent the escape of any fluid from the fluid channels 49and 50 adjacent the portion thereof occupied by the peripheries of the auxiliary rotors 40 and 4I. If by chance, any fluid should escape, provision is made to draw it back into the channels.

For this purpose, the rotor 48 is provided at the bottom of the grooves therein forming channels 49 and 50 with a one way check valve 23 establishing communication between the casing and each of the channels 49 and 50 (see Figure 7). The rotor 48 is formed with axial openings 48a therethrough which are in open communication with the interior of the casing. The check valves 23 permit iiuid to ilow into channels 49 v and 50 from the spaces 48a but prevent fluid from flowing out of the channels to the spaces 48a. When the valve 54 is in its open position, as shown in Figure 9, a suction is created in the channel behind the valve, between the valve and the auxiliary rotor 49. This suction serves to draw back into the channel 49 through valve 23 any fluid which has escaped from the channel. Of course, the same condition exists with respect to channel 50, which is also provided with a valve 23.

As previously stated, the shaft 39 upon which auxiliary rotors 40 and 4I are mounted is supported within bearings 42 and 43 carried in the side members 21 and 28 of the casing.

As best shown in Figures 6 and 7, the periphery of each of the auxiliary rotors 40 and 4| is cut away to provide a notch orr recess 10. The recess 10 in auxiliary rotor 40 is arranged in circumferentially spaced relation to the corresponding recess in rotor 4|. As will be described presently, these recesses provide for the passage,

without interference, of the valves 54 and 58 carried by the main rotor 48 and mounted in the fluid channels 4S!y and 50. The two peripheral recesses 10 in the auxiliary rotors 40 and 4| are spaced 180 degrees apart for a reason which will appear presently.

The valves The details of construction and arrangement of the valves 54 and v56 which are carried by the main rotor 48 and associated with the fluid channels 49 and 5U are best shown in Figures 6, '1, 9, 12 and 13. The particular shape of the valves is of substantial importance, although the valve need not necessarily be of the exact shape shown. The character of the recesses 53 and 55 and the manner in which the two valves 54 and 56 are mounted in the two recesses are exactly the same, therefore, a detailed description will be givenr ofv the construction and mounting of one valve only. y

The valve 54 is mounted in the recess 53 upon a shaft 1|. It is secured to the shaft, as shown in Figure 12, by a pin 12 countersunk into the top of the valve and extending through the shaft 1|. Shaft 1| is mounted in a recess 13 in the rotor 48 and projects out the side oi' the rotor, as indicated in Figure 2.

The valve 54 is provided at its opposite sides with a pair, of sealing elements 14 which are jo seed against the sides of the fluid channel when the valve is open and against the sides recess 53 when the valve is closed by means the springs 15. At one end the valve is also provided with a somewhat similar sealing element 16 which issecured to the valve by a pin 11 countersunk in the valve 54, and is urged against the walls of recess 53 by a spring 18.

The normal position of valve 54 is shown in Figure 7. Its operative position is shown in Figure 9. The valve may be rotated to any desired position from and including its operative posi-x tion and its inoperative position by rotating the shaft 1| to which it is secured. When in its operative position, as shown in Figure 9, the valve compresses the iiuid contained in the iluid channel 49 between the valve and the point of contact between auxiliary rotor 40 and main rotor 48.

Because valve 54 is of symmetrical formationv and its shaft 1| extends through its center of symmetry and mass, the iiuid pressure on either side of the valve, regardless of its position, is equally distributed. In other words, the valve is balanced so that the same relatively minute force is adequate to move it to or from its operative position or any intermediate position. In this respect, as in all others, valve `|i is like valve 54, v

It will, of course, be understood from the description thus far given, that the recesses 1l] in the periphery of the auxiliary rotors 40 and 4| are arranged to permit the passage of the Valves 54 and 56 when in their open position, in the manner indicated in Figure 6. It will also be understood that both valves 54 and 56 never pass the auxiliary rotors 40 and 4| at the same time. Thus, there is always maintained a compressing action when the valves are opened, regardless of vthe fact that one of the valves may at any particular moment be passing one of the auxiliary rotors 40 and 4 I. i

It has already been pointed out that the shalt 1| upon which valve 54 is mounted projects beyond the side of main rotor 48. The shaft 19 upon which valve 56 is mounted also projects out of the same side of the rotor 48 (see Figures 3 and 5). The position of this shaft is shown in section in Figure '7, and it does not appear in Figure 2 because it` falls behind the axle 20. Each of the shafts 1| and 19 is provided with radially extending arms 11a and 19a at their outer extremities.` Each of the arms lla and 19a is provided with a rotatable ball 90 for the pur pose which will now be described.

The valve actuating' assembly The construction and operation of the valve operating mechanism will best be understood by reference to Figures 2, 3, 4, 5, and 11. This mechanism includes a valve actuating ring 8l positioned within the easing at the left hand side of the main rotor 48 (see Figure 2). The Valve actuating ring 8| is movable axially upon pins Bla carried by the main rotor. `In other words, the valve actuating ring 8| rotates with the main rotor 48, but is movable axially with respect thereto, As best shown in Figure 4, the valve actuating ring is provided with a pair of channels 82 and B3 inclined to the radial 'which receive the balls 88 secured to the ends of the arms lla and 19a of valve shafts 1| and The axial movement of valve actuating ring 3| accordingly imparts a rotary movement to the valve shafts 1E and 19 whereby the valves 54 and 55 are actuated in response to axial movement of the valve actuating ring 8|. l

A non-rotatable split shift ring 84 surrounds and loosely embraces the outer periphery of the valve actuating ring 8|. Shift actuating ring 84 is not connected to valve ring 8| and the valve Y actuating ring moves circumferentially with respect to the shift ring 84. A split operating ring 85 surrounds the shift ring 84. The shift ring 84 is connected to the operating ring 85 by means of a plurality of pins 88 having one end secured to the shift ring 84 and having its other end provided with a roller 81 which extends into diagonal slots 88 formed in the operating ring 85.

Operating ring 85 is mounted for a limited circumferential movement, but is not movable axially. By reason of the connection between the shift ring 84 and the operating ring 85 through the pins 88 and the diagonal slots 88 just described, it will be understood that the shift ring 84 is moved axially in response to circumferential movement of the operating ring 85. .The ends of shift ring 84 are spaced apart and prevented from rotating by the tongue 85a on the spacer 85. 1 Provision is made for imparting Aa limited circumferential movement to the operating ring 85 by means of a gear segment 89 mounted Within an enlarged portion 88 of the casing. The external surface of the operating ring 85 is provided with cooperating teeth 8l which are engaged by the teeth of gear segment 88.

Gear segment 88 is secured to a rotatable shaft 92 journaled in the boss 98 formed in end portion 21 of the casing. At its outer extremity the shaft 82 is provided with a crank 83 adapted to be connected to the linkage elements I8 of the brake operating system shown in Figure 1.

Auxiliary rotors driving mechanism The shaft 88 to which the auxiliary rotors 48 and 4I are keyed is driven from the main rotor 48 through gear wheels 94 and 85 as best shown in Figures 2 and 10. The gear 84 is secured to the side of the main rotor 48 by the screws 88. The gear 95 is secured kto shaft I9 by a key 88a indicated in dotted lines in Figure 2. The gears 94 and 95 are of such size that the auxiliary rotors 48 and 4I make two complete revolutions while the main rotor 48 makes a single revolution.

While this difference in size of the main and auxiliary rotors is preferable in order to economize on space within the casing, it is not essen-- tial. The main rotor and the two auxiliary rotors may be of the same size, in which event they will be driven at exactly the same speed.

The operation.

When the present invention is embodied in a brake its function is, of course, to stop the rotation of the wheel axle.v The main rotor 48 rotates with the wheel axle 28 by reason of its connection to the wheel hub I8 which is in turn keyed to the wheel axle. 'Ihe casing is, of course, stationary, being connected to the non-rotating axle housing I8. Thus, in operation, the casing remains stationary and the rotors rotate when the axle rotates and are stationary when the axle is stationary'.

Of course, the fluid channels 49 and 58 are maintained full of any suitable fluid, such as conventional hydraulic brake uid, or the like. Except when the brake is utilized for braking purposes, the fluid contained in fluid channels 48 and 50 remains substantially stationary and the rotor 48 is rotated ln the fluid.

The valve 54 is shown in its non-braking position in Figure 7 and in its braking position in Figure 9. When in its non-braking position the main rotor 48 merely rotates in the fluid. When the valve 54 is in the braking position, shown in Figure 9, then the fluid containediri the fluid channels 48 and 58 is compressed between the valves 54 and 58, and the seals forrd by the peripheral engagement of the auxiliaryL rotors 48 and 4I with the main rotor in the filui channels 48 and 58. Because of the balanced formation of the valves 54 and 58, it will be readily afppreciated that but a slight force is needed open the valves to the position shown in Figure 9. Like- Wise, but a slight force is required tomove the valves from the operative position shownin Figure 9 to its inoperative position shown in Figure '7, for the same reason.

As previously described, the auxiliary-,rotors 48 and 4I are provided with peripheralv recesses 18 (see Figure 6) to permit the passage of the valves 54 and 58 when in their braking position. In order to avoid complete loss of braking effect when this passage occurs, the valves 54 and 58 and the corresponding recesses 18 in the auxiliary rotors 48 and 4I are staggered so that the two valves never pass the recesses in the auxiliary rotors at the same time. Thus, one of the valves is'always producing a braking effect, while the other valve is passing the auxiliary rotor. The two valves'are actuated simultaneously.

The valve actuating mechanism is shown in its nonbraking position in Figure 3, at which timer the valves 54 and 58 are in the position shown in Figure 7. The valve actuating mechanism is shown in its braking postion in Figure 5, at which time the valves 54 and 58 are in the position shown in Figure 9. i

As previously stated. the valves are actuated by the gear segment 88. When the gear segment 88 is rotated by means of the crank arm 89, a limited circumferential movement is imparted to the operating ring 85, which in turn imparts an axial movement to the shift ring 84, which moves the valve actuating ring 8l causing a rotation of the valve shafts 1I and 18. The relation of the arms 1Ia and 18a at the outer extremities of the valve shafts 1I and 18 during the novn-braking position is shown in Figure 4, and the relation of these parts during the braking position is shown in Figure 11.

The action of brake pedal I1 is transmitted to* crank 88 through linkage I8. Crank 93 oscillates gear segment 88. Gear 88 imparts a circumferential movement to operating ring 85. I'he circumferential movement of operating ring 85 is translated into an axial movement of valve ring 8i through the intermediate shift ring 84. Valves 54 and 58 are actuated in response to the axial movement of valve ring 8i through the connections shown at 1I, 1Ia, 88 and 82. Thus, it will be apparent that the impeller valves 54 and 58 are moved into and out of fluid channels 48 and 58 by operating the brake pedal I1.

In the drawings, the direction of rotation of the main rotor 48 and the auxiliary rotors 48 and 4I are shown by arrows (see Figures 6, 'I and 9).

It should be understood, however, that the device illustrated works equally well if the'drection of rotation of all the rotors is reversed. In other words, valves 54 and 58 work equally well for what might be termed a reverse rotation as well as for what might be termed a forward rotation. This is an inherent characteristic of the balanced valves 54 and 58 and will be readily apparent from an examination of Figures 6, 7, 9, l2 and 13.

From the foregoing description it will be apparent that the present invention provides a novel construction and arrangement of parts, which is especially applicable to brakes of all aimera kinds, and particularly to the brakes for motor vehicles. f

The scope of the invention is indicated in the appended claims.

l. In a device of the character described, a casing, a main rotor mounted in the casing to form therewith a pair of uid channels about the periphery of the rotor, a pair of valves pivotally mounted on the main rotor, each of said valves being adapted to be moved into and out of said fluid channels to vary the cross-sectional area thereof, and a pair of auxiliary rotors also mounted in the casing, each of said auxiliary rotors arranged with its periphery contacting the main rotor within a separate one of said channels. 2. The combination defined in claim 1, wherein the main rotor is provided with a recess communicating with each of said fluid channels within which is disposed one of said valves.

3. In a device of the character described, a casing, a main rotor mounted in the casing to form therewith a pair of fluid channels about the periphery of the rotor, a pair of valves pivotally mounted on the main rotor, each of said valves adapted to be moved into and out of a separate one of said fluid channels, a pair of auxiliary rotors also mounted in the casing, each of said auxiliary rotors arranged with its periphery contacting the main rotor within a separate one of said fluid channels, the periphery of each of the auxiliary rotors being cut away to permit the passage of the valve carried by the main rotor in the fluid channel with which said auxiliary rotor is associated.

4. The combination denedin claim 3, wherein the valves carried by the main rotor are spaced circumferentially from each other and the peripheral cutouts in the auxiliary rotors are spaced circumferentially from each other whereby one valve is positioned remote from its corresponding auxiliary rotor when the other valve is passing its corresponding auxiliary rotor.

5. In a device of the character described, a casing, a rotor mounted in the casing to form therewith a fluid channel, a valve carried by the rotor and adapted to be moved into and out of said channel, a Valve actuating ringr operatively connected to the valve and movable auxially with respect to the rotor to actuate the valve,

` and circumferentially movable means for moving the valve actuating ring axially with respect to the rotor.

6. In a device of the character described, a casing, a rotor mounted in the casing to form therewith a fluid channel, a valve carried by the rotor and adapted to be moved into and out of said channel, a valve actuating ring operatively connected to the valve and movable axially with respect to the rotor to actuate the valve, a nonrotatable shift ring embracing the valve actuating ring, and means for moving the shift ring axially with respect to the rotor.

7. In a device of the character described, a casing. a rotor mounted in the casing to form therewith a fluid channel, a valve carried by the rotor and adapted to be moved into and out of said channel, a valve actuating ring operatively connected to the valve aridl movable axially with respect to the rotor to actuate the valve, a non-rotatable shift ring embracing the valve acluating ring, a circumferentially movable operating ring secured to the shift ring to effect an axial movement thereof in response to the circumferential movement of the operating ring, and means for imparting a limited circumferential movement to the operating ring.

8. In a device of the character described, a casing, a rotor mounted in the casing to form therewith a fluid channel, a valve carried by the rotor and adapted to be moved into and out of `said channel, a valve actuating ring operatively connected to the valve and movable axially with respect to the rotor to actuate the valve, a nonrotatable shift ring embracing the valve actuating ring, a circumferentially movable operating ring secured to the shift ring to effect an axial movement thereof in response to the circumferential movement of the operating ring, and a gear mounted in the casing and arranged to impart a limited circumferential movement to the operating ring.

9. In a device of the character described, a casing, a rotor mounted in the casing to form therewith a fluid channel, said rotor having an annular contact surface forming an axial Wall of said channel, and a peripheral portion forming a radial wall of the channel, and a valve pivotally carried by the rotor, said valve being movable into and out of said channel to vary the cross-sectional area thereof. Y

l0. In a device of the character described, a casing, a rotor mounted in the casing to form therewith a pair of axially spaced fluid channels, the rotor being formed to provide adjacent its opposite sides corresponding annular contact surfaces each constituting an axial wall for one of said channels, and having a peripheral portion intermediate said contact surfaces providing at its opposite sides a radially extending wall for each of said channels, and a pair of valves mounted in said rotor in circumferentially spaced relation to each other, said valves being movable into and out of said channels to vary the cross-sectional area thereof.

11. In a device of the character described, a casing, a rotor mounted in the casing and having an annular groove about its periphery formlng with the casing a fluid channel, the bottom of said groove being provided with a recess, a valve pivotally mounted in the recess and adapted to be moved into and out of the channel, a valve actuating ring operatively connected to the valve and movable axially with respect to the rotor to actuate the valve, and means for moving the valve actuating ring axially with respect to the rotor.

12. In a device of the character described, the combination defined in claim l1 wherein the valve actuating ring is mounted upon the side of the rotor.

13. In a device of the character described, the combination defined in claim l1 wherein the valve includes an operating lever projecting through the side of the rotor, and wherein the valve actuating ring is mounted upon the side of the rotor.

14. In a device of the character described, a casing, a rotor mounted in the casing to form therewith a fluid channel about the periphery of the rotor` a valve carried by the rotor adapted cludes a non-rotatableaidaiiy movable shift ring embracing the valve actuating ring.

16. In a device of the character described, the

lsecured to the side of the rotor comprising an axially'movable valve actuating ring, a non-- rotatable axially movable shift ring embracing the valve actuating ring, and a circumferentially movable operating ring arranged to impart an axial movement to the shift ring, the valve actuating ring having an operative connection with the valve and the operating ring having an operative connection with the gear.

18. In a device of the character described, a casing, a rotor mounted in the casing to form therewith a pair of axially spaced fluid channels about the periphery of the rotor, a pair of valves pivotally mounted on -the rotor, each of said valves adapted to be moved into andout of a separate one of said channels, and means located at one iside ci thcfrotor for actuating both of said valves. f

19. In a device of the character described, a casing, a rotor mounted in the casing to form therewith a fluid channel, the rotor having a recess formed therein communicating with and being of the same Width as the channel, a valve Y pivotally mounted in the recess, one end of the valve being adapted to be swung into and out of the channel, the valve having resilient sealing elements at its opposite sides and at one end for engaging the adjacent walls of the recess and the sides of the channel.

20. In a device of the character described, a casing, a rotor mounted in the casing to form therewith a fluid channel. about the periphery of the rotor, lthe rotor being spaced axially from the sides of the casing and provided with openings extending axially therethrough communicating with the interiorV of the casing at the sides of the rotor, seals carriedby the rotor adjacent the iiuid channel to prevent the escape of uid therefrom, and a one-Way check valve arranged vbetween the uid channel and one of the axial in the reverse direction.

MASON P. CARPENTER. 

